[2] Gaztañaga signed a contract to work as a journalist at the Radio Euskadi [ast; ca; es; eu; fr; gl] network two years later.

[1] She later joined the Basque regional public broadcaster Euskal Telebista [ast; ca; de; es; eu; fr; gl] (EITB) where her television career commenced presenting the youth music programme Semáforo Pop.

[8] Gaztañaga further stated that the murder of a Russian woman days after she rejected a marriage proposal by her male partner on Patricia's Diary had no bearing on her decision to leave the programme.

[14][15] In September 2008, Gaztañaga began hosting the Antena 3 live debating programme No es programa para viejo for Spain's youth and topics such as their education, housing, relationships with their friends and parents and their future in the Labour market were discussed.

[2][17] In 2010, she presented the reality television programme Bodas Cruzadas on Cuatro which saw women provided the opportunity to marry their male partners.

[18] In September of that year, Gaztañaga hosted the Antena 3 reality show El marco [es] in which eight couples resided in a small space.

[26] In September 2015, she signed with RTVE to present the weekday reality entertainment show Cuestión de tiempo on La 1 in which contestants kept a special item in a box that was given to the person of their selection and the programme travelled to major Spanish settlements.